Communicating-door lock.



H. G. VOIGHT & N. B. HURD.

Patented Feb. 27, 1912.-

2 SHEETS-SHBET 1.

H. G. VOIGHT' & N. B. HUR'D. COMMUNICATING DOOR LOCK.

APPLICATION FILED JUNE 27, 1911.

Patented Feb.27, 1912.

2 SHEETS-SHEET 2.

q qm HOWE/ski W M g5 Q D @MWM COLUMBIA PLANOGRAPN cm, WASHINGTON, v

ITED STAWENT OFFICE.

HENRY G. VOIGHT AND NORMAN B. HURD, OF NEW BRITAIN, CONNECTICUT, ASSIGN-ORS TO RUSSELL & ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CON-NECTICUT, A CORPORATION OF CONNECTICUT.

COMMUNICATING-DOOR LOCK.

Specification of Letters Patent.

Application filed June 2'7, 1911.

To all whom it may concern:

Be it known that we, HENRY G. VOIGHT and NORMAN B. Hum), citizens of theUnited States, residing at New Britain, Hartford county, State ofConnecticut, have invented certain new and useful Improvements inCommunicating-Door Locks, of which the following is a full, clear, andexact description.

Our invention relates to looks, and particularly to those of a typeadapted for use on the doors of communicating apartments of hotels.

The object of the invention is to provide a lock of this character withsafety thumb bolts operable by independent thumb turns from oppositesides of the door in combination with a dead bolt operable from eitherside of the door, which bolt can be projected and retracted by a passkey or a guard key,

the construction being such, that either of the thumb bolts whenprojected alone, or both simultaneously when both are projected may besimultaneously retracted with the retraction of the main bolt by theguard key, but not by the pass key. The main bolt, however, cannot beretracted by the guest or key of the corridor door, nor by the operationof the thumb bolts. The communicating door may, therefore, be lockedfrom either side by a guest by means of the thumb bolts to prevent theopening of the door from the opposite side. The door may also be lockedby projection of the dead bolt by the pass key in the hands of the maidor housekeeper, but this key cannot retract either of the thumb bolts.The door may also be locked by projection of the main bolt by the guardkey, used in the hands of the bell boy, or some one in authority in thehotel, and this key may also retract either of the thumb bolts whenprojected alone, or both, when both are projected from either side ofthe door, so that, if it is desired to throw adjoining apartments ensuite, it is possible for the holder of this guard key to do so withoutthe necessity of going around to the other apartment to release thethumb bolt operable by the thumb turn from that Side only.

Another feature of this invention resides in the fact that both the passand guard keys used with this look are of the drill pin type, and may beoperated from either side of the door to perform the functions aboveoutlined.

With the objects enumerated in View, the invention consists in theconstruction and arrangement of parts, the preferred embodiment of whichis illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of the lock, the cover plate being removedfor clear illustration. Fig. 2 is an elevation of the face plate,showing the several bolts. Fig. 3 is a view similar to Fig. 1 showingthe dead bolt and one thumb bolt in projected position. Fig. 4 is asectional View of the lock on the line ww, Fig. 3. Fig. 5 comprises aplan and sectional view of the duplicate thumb turn roll-backs. Fig. 6is a detail view of the dead bolt, and a thumb bolt connecting membercarried thereby. Fig. 7 is a detail View of the thumb turn roll-backreleasing member. Fig. 8 comprises side elevations of two tumbler bars,used in conjunction with the tumbler mechanism of the dead bolt. Fig. 9

is a View of the ward of the pass key, and,

Fig. 10 is a similar view of the guard key.

In the embodiment of our invention herein selected for illustration, 1indicates the lock case, 2 the cover plate therefor, 3 the face plate, 4the dead bolt, 5 one of the thumb bolts, and 6 the companion thumb bolt.The main bolt is provided with upper and lower sets of tumblers, theupper set being gated to cooperate with a fence post 7 and operateddirectly by a key inserted from the out side in a keyhole 8 shown in thecover plate, Fig. 4. The lower set is connected with the upper set bymeans of tumbler bars 9 and 10, respectively, and this set is operateddirectly by a key inserted through the inside keyhole 11, (Figs. 3 and41). The outer keyhole 8 is provided with a key post 12, the innerkeyhole with a key post 13, adapted to receive the drill pins of thepass key 14: and guard key 15. The thumb bolts 5 and 6, which we willterm for convenience upper and lower thumb bolts, are operable byduplicate thumb turn roll-backs 17 each having an arm 18 engaging theroll-back slot 19 of its bolt, which arm is engaged by a spring 20 tohold it in projected or retracted position and in position to deadlockits bolt in the manner well-known in this art. Each roll-back is alsoprovided with a releasing arm 21, which is engaged and operated by areleasing lever 22, which in turn is operated by one of the upper setsof tumblers of the main bolt, as hereinafter described. Beneath thethumb bolts, as viewed in Figs. 1 and 3, is located a slidingbolt-connecting member 23 having a post'24 which lies within slots 25 inthe forward ends of the thumb bolts, and having a spring 26 which holdssaid latching member 23 to spring a lug 27 on its rear end into the pathof the projection 28 on a complementary latching member 29 pivoted at 30on the main bolt 4. (See Fig. 6.) This complementary latching member hasa spring 31 to maintain its shoulder 28 normally out of line with thelug 27 on the first latching member.

The upper set of tumblers of the clear bolt comprises the usualplurality of gated members cooperating with the fence post to determinethe permutations of the lock and confine the operation of the lock tocertain predetermined keys. Said set also includes a latch operatingreleasing member 32, Fig. 3, which overlies the latch member 29, and hasa depressed bar 33 which is adapted to engage a lug 34 at the rear loweredge of the latch member 29. This latch operating and releasing memberalso has a projection 35 adapted when said member is raised by theproper key, to swing the releasing lever 22 upward, and thus release thethumb turn roll-backs 17 from the dead locking position indicated inFig. 3. The pass and guard keys, respectively are so bitted that thefirst will not raise the latch operating and release member 32sufiiciently to cause it in turn to raise the latch member 29 to bringits shoulder 28 into the path of the lug 27 on the latch member 23 whensaid member 23 is drawn forward by either one or both of the thumb bolts5 and 6, as shown in Fig. 3, hence, while the pass key may project andretract the dead bolt, it cannot retract either of the thumb bolts. Theguard key, however, by its bitting is adapted to raise the latchoperating release member 32, and consequently the latch member 29 tobring the latter into engagement with the lug 27 of the latch member 23,whereby retraction of the dead bolt by the guard key will simultaneouslyretract either or both of the thumb bolts 5 and 6.

As above stated, the direct operation of the latch operating and releasemember is effected from the outer keyhole. In order that the sameoperation may be performed from the-inner side of the door, the tumblersof the second or lower set are so located and shaped that they may beoperated by keys inserted from the inner side or in the keyhole 11, andthrough the tumbler bars 9 and 10, effect release of the gated tumblersof the upper set from the fence post 7 and proper actuation of the boltconnecting latches when the guard key is operated. To this end the lowertumblers include duplicate superposed tumblers, such for example as 36(Fig. 3) each having a projection 37. The tumbler bars 9 and 10 aregated as at 39, Fig. 8, respectively, to receive the projections 37 atthe rear of the tumbler operating levers 36. The tumbler levers 36 areso arranged that one,here the lower one 9will be raised in advance ofthe upper by the bitting of the pass key, whereby the squared port-ion40 of its upper end will raise the gated tumblers of the upper end torelease them from their fence and permit projection of the dead bolt bya key inserted in the inner-here the lower keyhole. This tumbler bar 9is also provided with a notch 41 which registers with the latch.operating and release member 32 of the upper set, and therefore fails toraise said member sufficiently when the bar 9 is raised by said pass keyto cause connection between the connecting members on the main and thumbbolts, respectively.

The slot 28 in the bar 9 has a downward extension 42 to allow clearancefor the projection 37 of the upper tumbler lever 36, and the companiontumbler bar 10 is provided with an extension 43 of its slot 39 to allowof the advance movement of the projection 37 of the lower tumbler lever36 when the pass key is operating toward raising of said bar 10 by saidpass key. The guard key is so bit-ted, however, that the upper tumblerlever 36 is raised to the same extent as the lower, and by itsprojection 37 raises the tumbler bar 10, which by .its squared upper endat not only releases the gated tumblers of the upper set, but alsoraises the latch operating and releasing member 32 sufliciently to causeit to raise the lower latch 29 into engagement with the thumb bolt latch23, so that upon retraction of the main bolt by the guard key, either orboth of the thumb bolts, if projected, will be retracted.

By the mechanism above described, therefore, the communicating door maybe barred from being opened from either side by the guests, and it maybe barred against being opened from one side or the other by the passkey when either of the thumb bolts is projected, and finally, it may beopened from either side by the holder of the guard key, whether lockedby either or both of the thumb bolts.

lVhile we have herein described a particular embodiment of ourinvention, it may be altered in detail and relative arrangement ofparts, without departing from the spirit and scope thereof.

What we claim is:

1. In a lock mechanism, the combination with a pair of independentbolts, and independent means for operating said bolts respectively fromopposite sides of the door, a key controlled bolt, a plurality of keysincluding a pass key and a guard key for operating said bolt, and meanswhereby both of said pair of bolts may be retracted by the retraction ofsaid key controlled bolt by said guard key, and may be prevented fromretraction by the retraction of said key bolt by said pass key.

2. In a lock mechanism, the combination with a pair of independentbolts, independent means for actuating said bolts respectively fromopposite sides of the door, key controlled means, a plurality of keysincluding a pass key, and a guard key, and means whereby'both of saidpair of bolts may be retracted by operation of said key controlled meansby said guard key, and may be prevented from the retraction by operationof said key controlled means by said pass key.

3. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts respectively fromopposite sides of the door, key controlled means operable from eitherside of the door, a plurality of keys including a pass key and a guardkey, and means whereby both of said independent bolts may be retractedby operation of said key controlled means by said guard key, and wherebyretract-ion of either of said independent bolts may be prevented byoperation of said key controlled means by said pass key.

4. In a lock mechanism, the combination with independent bolts,independent means for operating said bolts respectively from oppositesides of the door, a key controlled bolt operable from either side ofthe door, a plurality of keys including a pass key and a guard key,connecting mechanism between said key controlled bolt and saidindependent bolts operable to permit retraction of said independentboltsby retraction of the key controlled bolt by said guard key and toprevent retraction of said independent bolts by retraction of said keycontrolled bolt by said pass key.

5. In a lock mechanism, the combination. with independent bolts,independent rollbacks for operating said bolts respectively fromopposite sides of the door, a key controlled bolt operable from eitherside of said door, a connecting member slidingly carried by the lockcase, a second connecting member carried by said key controlled bolt,and means whereby said connecting members may be connected by operationof said guard key in projecting and retracting said key controlled boltto retract said independent bolts, and may be prevented from beingconnected by operation of said key controlled bolt by said pass key.

6. In a lock mechanism, the combination with a pair of independentbolts, independent roll-backs for operating said bolts respectively fromopposite sides of the door, means whereby said roll-backs may deadlocktheir respective bolts, a member for releasing said roll-backs fromdeadlocking position, a key controlled bolt operable from either side ofthe door, a plurality of keys including a pass key and a guard key foroperating said bolt, and means whereby said deadlock releasing membermay be operated and said independent bolts may be retracted by operationof said key controlled bolt by said guard key, and whereby retraction ofsaid independent bolts by operation of said key controlled bolt by saidpass key may be prevented.

7. In a lock mechanism, the combination with a pair of independentbolts, independent mechanisms for operating said bolts from oppositesides of the door respectively, a key controlled bolt, a plurality ofsets of tumblers for said bolt, a plurality of keys including a pass keyand a guard key, one of said sets of tumblers being arranged to beoperated directly from the outside by both of said keys, ,the other setbeing adapted to be operated directly from the inside by both of saidkeys, one of said sets of tumblers, including a member adapted toconnect said independent bolts and said key controlled bolt whenoperated by said guard key from the inside or the outside, and means toprevent operation of said connecting means by said pass key operatingfrom either side of the door, whereby said inde pendent bolts may beretracted by retraction of said key controlled bolt by said guard keyexclusively.

8. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts from opposite sides ofthe door respectively, a key controlled bolt operable from either sideof the door, a plurality of keys including a pass key and a guard key, aset of tumblers for said key controlled bolt operated directly from theoutside by either of said keys, a second set of tumblers for Said keycontrolled bolt operated from the inside directly by either of saidkeys, connecting means between said sets of tumblers, and a connectingmember included in one of said sets of tumblers adapted to connect saidkey controlled bolt with said independent bolts whereby said independentbolts may be retracted by operation of said key cont-rolled bolt by saidguard key from either side of the door, and whereby retraction of saidindependent bolts may be prevented during operation of said keycontrolled bolt by said pass key from either side of the door.

9. In a lock mechanism, the combination with a pair of independent boltsand inclependent thumb turns for operating said bolts from oppositesides of the door respectively, a key controlled dead bolt, a pluralityof tumblers for said dead bolt, a plurality of keys for operating saidtum blers including a pass key and a guard key, connecting means betweensaid dead bolt and said pair of bolts, said tumbler mechanism includinga tumbler adapted when operated by said guard key to connect said pairof bolts with said dead bolt whereby the former may be retracted by thelatter, and adapted when said pass key is operated to prevent suchconnection of said bolts.

10. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts from op posite sidesof the door respectively, a third bolt-adapted to be operated fromeither side of the door, a plurality of sets of tumblers for said thirdbolt, one of which is operated directly from one side of the door, theother directly from the opposite side of the door, tumbler barsconnecting said sets of tumblers, means for connecting said pair ofbolts with said key bolt operable by a tumbler of one of said sets oftumblers, a tumbler in said second set adapted to operate one of saidtumbler bars and thereby to operate said tumbler of the first set, asecond tumbler in said second set adapted to operate a second tumblerbar and thereby to operate the tumblers of the first set, with theexception of said tumbler thereof mentioned, said first tumbler barbeing arranged to be only so operated by said guard key.

11. In a lock mechanism, the combination with a pair of independentbolts, independ ent means for operating said bolts from opposite sidesof the door respectively, a key controlled bolt, a connecting membermount ed on a lock case adapted to engage said pair of bolts, :1.connecting member carried by said key controlled bolt, a tumblermechanism for said key controlled bolt, a plurality of keys including apass key .and a guard key, said tumbler mechanism including a tumbleradapted to be operated by said guard key only to cause interengagementof said connecting members whereby both of said pair of bolts may beretracted by operation of said key controlled bolt.

12. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts respectively fromopposite sides of the door, a key controlled belt, a keyhole on theouter side of said look, a key post for operating therewith, a set oftumblers for said bolt, a plurality of drill pin keys adapted to beinserted in said keyhole and to engage said key post to operate saidtumblers directly, a second keyhole on the opposite side of said look, akey post cooperating therewith adapted to receive said drill pin keys, aset of tumblers for said key controlled bolt adj acent to said secondkeyhole, means whereby said first set of tumblers may be operated by theoperation of said second set, means of connection between said pair ofbolts and said key controlled bolt, said first set of tumblers includinga tumbler adapted to operate said connecting means by operation of saidguard key when the latter is operated from the outer side or inner sideof the lock, and means to prevent the operation of said connecting meanswhen said pass key is operated. I

13. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts respectively fromopposite sides of the door, a key controlled bolt, means for connectingsaid key controlled bolt to said pair of bolts, a set of tumblers forsaid key controlled bolt including a tumbler adapted to operate saidconnecting means, a plurality of keys in cluding a pass key and a guardkey, means whereby said guard key may operate all of said tumblers fromeither side of the door to retract said pair of bolts and said key boltsimultaneously, and means whereby said pass key may retract only saidkey con trolled bolt from either side of the door.

14. In a lock mechanism, the combination with a pair of independentbolts, independent means for operating said bolts respectively fromopposite sides of the door, a key controlled bolt, a member mounted inthe lock case and adapted to engage either or both pair of bolts, amember carried by said key controlled bolt, a plurality of keysincluding a pass key and a guard key, a connecting member operated bysaid key controlled bolt and adapted to engage the first connectingmember, and means whereby only said guard key may effect such connectionand retract said key controlled bolt, and either or both of said pair ofbolts simultaneously. 15. In a lock mechanism, the combination with apair of independent bolts, independent means for operating said boltsrespectively from opposite sides of the door, a key controlled bolt, twosets of tumblers for said bolt, means adapted to connect said pair ofbolts with said key controlled bolt, one of said sets of tumblersincluding means for eitecting such connection, a tumbler bar con nectingsaid sets of tumblers including said tumbler for effecting suchconnection, a second tumbler bar, connecting said second set of tumblersexclusive of said tumbler, a plurality of keys including a pass key, anda guard key, said guard key being adapted to operate said first set oftumblers directly from one side of the lock and to operate said key isadapted to operate only said key confirst Sgt of tumblers 1iondirliotlyEhrough said trolled bolt.

secon set, and tum ler ars rom the in- T a side of the lock to retractsaid key controlled bolt and simultaneously said pair of bolts, saidpass key being adapted to oper- WVitnesses:

ate said tumbler mechanism exclusive of M. S. WIARD,

said particular tumbler whereby said pass H. J. BROWNE.

Copies of thispatent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

